Howdy! I've posted a response to a similar thread, from earlier today...
Bienvenido/Welcome!
I've only been at this about a month, but the array of options and vendors is daunting! A few things I've found:
1. The closest thing to a "standard" seems to be the 510 platform (This includes 510, Ego, Riva, etc). If you get a "510 compatible", you can use it on a wide range of stuff.
2. Once you get into this, and quit smoking, you will want a somewhat larger battery. 650mah or larger is good. And buy two batts.
3. Liberty Flights seems to have a good selection, and they're headquartered in the UK. A Riva kit would be a good way to go...
Riva Starter Kits
Electronic Cigarette - Starter Kits - Riva 510
An Ego would also be nice
Electronic Cigarette - Starter Kits - Joye eGo
If you really want a mini, these 510 kits might work
Electronic Cigarette - Starter Kits - Joye 510
Probably best to start with an Ego or Riva, as the larger batts will come in handy. Again, these are "510-compatible". If you want the mini form factor, you can find often a mini 510 battery & charger for 5 Euros, if you look around.
Buy some Cartomizers, to start with. These are really easy to fill (take off the "condom" cap, add 20 or so drops, and slowly slide it back on). Here are some, from the same vendor... get the 510...
Electronic Cigarette - Cartomizers - Boge Cartomizers
Buy some juice... you may want to experiment with both PG and VG, as some have problems with one or the other. Buying a few 5ml bottles is a nice way to do that. Though I would probably pick out at least one 30ml bottle, so you're sure you have a stockpile and don't run out.
The nice thing is that all will use the same atomizers, so you can swap them across the platforms. And the Ego and Riva are pretty much entirely compatible, with only some very minor differences. Buy one of those kits, along with some cartomizers & juice, and you're on your way. You will probably experiment with other stuff later (eg. mods, tanks, etc.), but those kits will still come in handy and parts will likely be usable.
A few problems with the site you linked to:
1. I don't know what platform it is, but it looks to be something other than 510. You might have difficulty finding replacement cartridges, at a good price.
2. Those small batteries can wear out quickly, especially as you get into this. If you go with an Ego or Riva, you've got something only a bit larger that lasts 3-7x longer.
3. Buy a system that will more easily allow you to drip juices into it. You'll save a lot of money and have fun experimenting. As you get into a Riva or Ego, you can do that.
Welcome!